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The distribution of a population of mechanical aptitude test is normal, with a mean of 46 and a standard deviation of 4. To test the impact of a job training program, a sample of 26 scores was obtained from employees who took the training program. The sample yielded a mean of 53.
State the Null hypothesis?
What z score must be obtained from the sample in order to reject the null hypothesis at an alpha level of .05?
Use an alpha level of .01 and test the hypothesis that the two methods are producing the same mean.
If the speed of lights is 3.00x 10 to the power of 8 m/sec, how long does it take light to travel 2.29x 10 to the power of 11 m, the distance from the sun to Mars? Round to one decimal place.
Which of the following scenarios would lead to the most accurate estimate of the amount of parking fees collected during the week?
suppose that college faculty with the rank of professor at tow-year institutions earn an average of 64571 per year with
Research question : At α = . 05, is cockpit noise level independent of flight phase?
listed below are the playing times in seconds of songs that were popular at the time of this writing. find the amean
In a large department store a customer complaints office handles an average of six complaints per hour about the quality of service.
There are 400 employes and 100 of them smoke. There are 250 males working for the company and 75 of them smoke. What is probability of an emloye selected random?
Dating In Chances- Risks and Odds in Everyday Life, James Burke claims that about 70 percent of all single men would welcome a woman taking the initiative in asking for a date. A random sample of 20 single men was asked if they would welcome the woma..
Given the same significance level, a ________ value of t will be required to reject the null hypothesis compared to the value of z required for rejection.
Is there a more efficient way to design the experiment to answer the same question? In other words, is there a better way to make use of this data?
Below is the number of new cars sold at Sharkey in the last seven months and for the last eight months at Dave White. Do you agree with Mr. Sharkey? Use the .01 significance level."
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